# 在列表中新增元素
a = [1,2,3,4]
for i in range(0,len(a)):
    print(a[i])
print("====")
a.append('h')
for i in range(0,len(a)):
    print(a[i])
print("====")
a.insert(1,'g')
for i in range(0,len(a)):
    print(a[i])
print("====")